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diff --git a/src/devices/bus/centronics/covox.h b/src/devices/bus/centronics/covox.h
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+// license:BSD-3-Clause
+// copyright-holders:Miodrag Milanovic
+/***************************************************************************
+
+ Covox Speech Thing
+
+***************************************************************************/
+
+#ifndef __CENTRONICS_COVOX_H__
+#define __CENTRONICS_COVOX_H__
+
+#pragma once
+
+#include "ctronics.h"
+#include "sound/dac.h"
+
+// ======================> centronics_covox_device
+
+class centronics_covox_device : public device_t,
+ public device_centronics_peripheral_interface
+{
+public:
+ // construction/destruction
+ centronics_covox_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // optional information overrides
+ virtual machine_config_constructor device_mconfig_additions() const;
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data0 ) { if (state) m_data |= 0x01; else m_data &= ~0x01; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data1 ) { if (state) m_data |= 0x02; else m_data &= ~0x02; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data2 ) { if (state) m_data |= 0x04; else m_data &= ~0x04; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data3 ) { if (state) m_data |= 0x08; else m_data &= ~0x08; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data4 ) { if (state) m_data |= 0x10; else m_data &= ~0x10; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data5 ) { if (state) m_data |= 0x20; else m_data &= ~0x20; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data6 ) { if (state) m_data |= 0x40; else m_data &= ~0x40; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data7 ) { if (state) m_data |= 0x80; else m_data &= ~0x80; update_dac(); }
+
+private:
+ required_device<dac_device> m_dac;
+
+ void update_dac();
+
+ UINT8 m_data;
+};
+
+// device type definition
+extern const device_type CENTRONICS_COVOX;
+
+// ======================> centronics_covox_stereo_device
+
+class centronics_covox_stereo_device : public device_t,
+ public device_centronics_peripheral_interface
+{
+public:
+ // construction/destruction
+ centronics_covox_stereo_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // optional information overrides
+ virtual machine_config_constructor device_mconfig_additions() const;
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ virtual DECLARE_WRITE_LINE_MEMBER( input_strobe ) { m_strobe = state; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data0 ) { if (state) m_data |= 0x01; else m_data &= ~0x01; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data1 ) { if (state) m_data |= 0x02; else m_data &= ~0x02; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data2 ) { if (state) m_data |= 0x04; else m_data &= ~0x04; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data3 ) { if (state) m_data |= 0x08; else m_data &= ~0x08; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data4 ) { if (state) m_data |= 0x10; else m_data &= ~0x10; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data5 ) { if (state) m_data |= 0x20; else m_data &= ~0x20; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data6 ) { if (state) m_data |= 0x40; else m_data &= ~0x40; update_dac(); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_data7 ) { if (state) m_data |= 0x80; else m_data &= ~0x80; update_dac(); if (started()) output_busy(state); }
+ virtual DECLARE_WRITE_LINE_MEMBER( input_autofd ) { m_autofd = state; update_dac(); }
+
+private:
+ required_device<dac_device> m_dac_left;
+ required_device<dac_device> m_dac_right;
+
+ void update_dac();
+
+ int m_strobe;
+ UINT8 m_data;
+ int m_autofd;
+};
+
+// device type definition
+extern const device_type CENTRONICS_COVOX_STEREO;
+
+#endif /* __CENTRONICS_COVOX_H__ */